.page-features {
  --feat-scope-width: 45ch;
  --feat-glass-line: color-mix(in srgb, var(--color-line) 75%, transparent);
}

.page-features .feat-crumbs {
  padding-top: var(--space-3);
}

/* 首屏 */
.page-features .feat-hero__intro {
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.page-features .feat-hero__kicker {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-features .feat-hero__title {
  margin: 0 0 var(--space-3);
  max-width: 20ch;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary);
}

.page-features .feat-hero__lede {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-features .feat-hero__jumps {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* 数字带 */
.page-features .feat-stage {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 360px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  box-shadow: var(--shadow-2);
}

.page-features .feat-stage__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-features .feat-stage__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-features .feat-stage__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: var(--space-4) var(--space-4) var(--space-3);
}

.page-features .feat-stage__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-2);
}

.page-features .feat-figure__val {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-contrast-accent);
}

.page-features .feat-figure__num {
  font-variant-numeric: tabular-nums;
}

.page-features .feat-figure__unit {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.85;
}

.page-features .feat-figure__label {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.9;
}

.page-features .feat-stage__note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* 分组 */
.page-features .feat-group {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .feat-group--quality {
  border-top-width: 6px;
  border-top-color: var(--color-primary);
}

.page-features .feat-group--archive {
  border-top: 3px solid var(--color-accent);
}

.page-features .feat-group--coverage {
  --feat-metric-bg: color-mix(in srgb, var(--color-primary-soft) 62%, transparent);
  --feat-value-ink: var(--color-primary);
}

.page-features .feat-group--quality {
  --feat-metric-bg: color-mix(in srgb, var(--color-highlight) 78%, transparent);
  --feat-value-ink: var(--color-accent);
}

.page-features .feat-group--archive {
  --feat-metric-bg: color-mix(in srgb, var(--color-accent) 16%, transparent);
  --feat-value-ink: var(--color-accent);
}

.page-features .feat-group__head {
  margin-bottom: var(--space-4);
}

.page-features .feat-group__lede {
  max-width: var(--measure);
  margin: var(--space-2) 0 0;
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .feat-quality__top {
  display: grid;
  gap: var(--space-4);
}

/* 指标条 */
.page-features .feat-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-features .feat-metric {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--feat-glass-line);
  border-radius: var(--radius-lg);
  background: var(--feat-metric-bg, color-mix(in srgb, var(--color-surface) 72%, transparent));
  box-shadow: var(--shadow-1);
}

.page-features .feat-metric__idx {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-features .feat-metric__name {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.35;
  color: var(--color-ink);
}

.page-features .feat-metric__scope {
  margin: var(--space-1) 0 0;
  max-width: var(--feat-scope-width);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.page-features .feat-metric__value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--feat-value-ink, var(--color-primary));
}

.page-features .feat-metric__unit {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .feat-metric__calc {
  border-top: var(--border-thin) dashed var(--feat-glass-line);
  padding-top: var(--space-1);
}

.page-features .feat-metric__calc .acc-trigger {
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .feat-metric__calc .acc-panel p {
  margin: var(--space-1) 0 0;
  max-width: 62ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* 图表面板 */
.page-features .feat-chart,
.page-features .feat-years {
  margin: 0;
  padding: var(--space-3);
}

.page-features .feat-chart__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink-soft);
}

.page-features .feat-chart__svg,
.page-features .feat-years__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-features .feat-chart__slot {
  fill: color-mix(in srgb, var(--color-surface-deep) 85%, transparent);
}

.page-features .feat-chart__bar--a {
  fill: var(--color-primary);
}

.page-features .feat-chart__bar--b {
  fill: var(--color-accent);
}

.page-features .feat-chart__bar--c {
  fill: var(--color-highlight);
}

.page-features .feat-chart__bar--d {
  fill: var(--color-primary-soft);
}

.page-features .feat-chart__text {
  fill: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.page-features .feat-years__slot {
  fill: var(--color-surface-deep);
}

.page-features .feat-years__slot--active {
  fill: var(--color-accent);
}

.page-features .feat-years__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* 媒体 */
.page-features .feat-media-row,
.page-features .feat-archive {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-features .feat-media-row .media-frame,
.page-features .feat-archive__media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.page-features .feat-media-row .media-frame img,
.page-features .feat-archive__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-features .feat-cap {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* 口径表 */
.page-features .feat-table {
  width: 100%;
}

.page-features .feat-table__caption {
  caption-side: top;
  text-align: left;
  padding-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .feat-table th,
.page-features .feat-table td {
  padding: var(--space-2);
  vertical-align: top;
  line-height: 1.65;
}

.page-features .feat-table thead th {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  border-bottom: var(--border-thin) solid var(--color-line);
  white-space: nowrap;
}

.page-features .feat-table tbody td {
  font-size: var(--text-sm);
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--feat-glass-line);
}

.page-features .feat-table tbody td:first-child {
  min-width: 12ch;
  font-weight: var(--weight-heading);
}

/* 边界 */
.page-features .feat-boundary__panel {
  padding: var(--space-6) var(--space-4);
  color: var(--color-contrast-ink);
}

.page-features .feat-boundary__panel .section-kicker {
  color: var(--color-contrast-accent);
}

.page-features .feat-boundary__panel h2 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-features .feat-boundary__list {
  display: grid;
  gap: var(--space-2);
  max-width: 88ch;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-features .feat-boundary__list li {
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-contrast-line);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-contrast-ink);
}

.page-features .feat-boundary__list strong {
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
}

.page-features .feat-links {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .feat-links a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 进阶入口 */
.page-features .feat-advanced__panel {
  display: grid;
  gap: var(--space-3);
  justify-items: start;
  padding: var(--space-6) var(--space-4);
}

.page-features .feat-advanced__panel h2 {
  margin: 0;
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features .feat-advanced__panel p {
  margin: 0;
  max-width: var(--measure);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

@media (min-width: 760px) {
  .page-features .feat-stage {
    min-height: 420px;
  }

  .page-features .feat-stage__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-features .feat-metric {
    grid-template-columns: 48px minmax(0, 1fr) minmax(150px, auto);
    grid-template-areas:
      "idx .page-features value"
      "calc calc calc";
    align-items: start;
    column-gap: var(--space-4);
  }

  .page-features .feat-metric__idx {
    grid-area: idx;
  }

  .page-features .feat-metric__body {
    grid-area: body;
  }

  .page-features .feat-metric__value {
    grid-area: value;
    justify-self: end;
    text-align: right;
  }

  .page-features .feat-metric__calc {
    grid-area: calc;
    margin-top: var(--space-1);
  }

  .page-features .feat-quality__top {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 860px) {
  .page-features .feat-media-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-features .feat-archive {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }
}
<<<END>>>